Insights about levels and sources of organic pollution in an urbanized Amazon estuary (Belém, PA, Northern Brazil).

Autor: Dos Santos Rodrigues CC; Federal University of Pará, Rua Augusto Corrêa, 1 - Guamá,, Belém, PA, 66075-110, Brazil. santos.camilac@gmail.com., da Silva Messias M; Federal University of Sergipe, Av. Marechal Rondon, s/n - Jd. Rosa Elze, São Cristóvão, SE, 49100-000, Brazil., Morales JHA; Federal University of Pará, Rua Augusto Corrêa, 1 - Guamá,, Belém, PA, 66075-110, Brazil., Damasceno FC; Federal University of Sergipe, Av. Marechal Rondon, s/n - Jd. Rosa Elze, São Cristóvão, SE, 49100-000, Brazil., Corrêa JAM; Federal University of Pará, Rua Augusto Corrêa, 1 - Guamá,, Belém, PA, 66075-110, Brazil.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2023 May 25; Vol. 195 (6), pp. 731. Date of Electronic Publication: 2023 May 25.
DOI: 10.1007/s10661-023-11271-0
Abstrakt: Amazon aquatic systems have been affected by organic pollution from urbanized regions. This study was conducted to determine the levels, sources, and distribution patterns of 16 polycyclic aromatic hydrocarbons (PAHs) and 6 steroid markers in surficial sediments from an important urbanized Amazon estuarine system (Belém, PA, Northern Brazil). Total PAH concentration (∑PAH) ranged from 878.2 to 9905.7 ng g -1 , 3295.2 ng g -1 on average, suggesting a highly contaminated environment. PAH molecular ratios and statistical analysis indicated that PAH originated from a mixture of local sources emissions, mainly related to the combustion of fossil fuels and biomass. Coprostanol levels (maximum concentration = 292.52 ng g -1 ) could be compared to the mid-range reported in the literature. Studied stations, except for one, presented sterol ratio data indicating organic matter related to untreated sewage. Sterols indicative of sewage contamination showed a correlation with pyrogenic PAH amounts which are transported by the same channels where sewage is discharged.
(© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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